"Successful technologies often begin as hobbies. Jacques Cousteau invented scuba diving because he enjoyed exploring caves. The Wright brothers invented flying as a relief from the monotony of their normal business of selling and repairing bicycles."

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Only the flowing water is pure and sweet. Only the spinning top and the moving bicycle do not fall over. Rest is not found in irregular and purposeless motion, nor is it stagnation; all real and firm rest is to be sought in harmonious action.

— Anna Brackett